feat(toolkit): input types

[badayvedat]

Proposed Interface

import os
from pydantic import BaseModel


from fal.toolkit.types import FileInput, ImageInput

class Input(BaseModel):
    image: ImageInput
    file: FileInput

a = Input(
    image="https://storage.googleapis.com/falserverless/model_tests/remove_background/elephant.jpg",
    file="https://raw.githubusercontent.com/fal-ai/fal/refs/heads/main/README.md"
)

with a.image.as_temp_file() as file_path:
    # Path("/tmp/...")
    print(file_path)

pil_image = a.image.to_pil()
print(pil_image)

with a.file.as_temp_file() as file_path:
    # Path("/tmp/...")
    print(file_path)

[efiop]

Something started hanging in 3.12 specifically, likely not caused by this PR. I'm investigating.

[efiop]

It was hanging due to deprecated pkg_resources 8d992f1 , rebasing